SpringBoot整合Jdbc

（1）、添加相关依赖

        <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-jdbc</artifactId>
         </dependency>

         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
             <version>8.0.14</version>
         </dependency>

（2）、在配置文件中配置数据源相关信息

 spring.datasource.username=root
 spring.datasource.password=123456
 spring.datasource.url=jdbc:mysql://localhost:3306/JdbcDemo?serverTimezone=UTC
 spring.datasource.driver-class-name=com.mysql.jdbc.Driver

（3）、编写service、dao（为了方便我就写在一起了）

 package cn.coreqi.service;

 import cn.coreqi.entities.User;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.jdbc.core.BeanPropertyRowMapper;
 import org.springframework.jdbc.core.JdbcOperations;
 import org.springframework.jdbc.core.RowMapper;
 import org.springframework.stereotype.Service;

 import java.util.ArrayList;
 import java.util.List;

 @Service
 public class UserService {
     @Autowired
     private JdbcOperations jdbcOperations;
     public void addUser(User user){
         jdbcOperations.update("insert into users(UserName,PassWord,Enabled) values (?,?,?)"
         ,user.getUserName(),user.getPassWord(),user.getEnabled());
     }
     public void addUserList(List<User> users){
         List<Object[]> datas = new ArrayList<>();
         for (User s : users){
             datas.add(new Object[]{s.getUserName(),s.getPassWord(),s.getEnabled()});
         }
         jdbcOperations.batchUpdate("insert into users(UserName,PassWord,Enabled) values (?,?,?)"
         ,datas);
     }
     public User getUserById(Integer id){
         RowMapper<User> rowMapper = new BeanPropertyRowMapper<>(User.class);
         return jdbcOperations.queryForObject("select * from users where Id = ?",rowMapper,id);
     }
     public List<User> getUsers(){
         RowMapper<User> rowMapper = new BeanPropertyRowMapper<>(User.class);
         return jdbcOperations.query("select * from users",rowMapper);
     }
     public Long getUsersSize(){
         return jdbcOperations.queryForObject("select count(Id) from users",Long.class);
     }
 }

（4）controller调用即可